This series has some potential.
No, it's not the Blade movies, it is different. And that can be a good thing.
Once "Sticky" makes the role his own and stops trying to act like Wesley Snipes' Blade character, I think his role and his acting will improve.
The rest of the folks do a decent acting job and the story looks like it has an arc that can last a while. The supporting cast looks pretty strong. If Spike gives it a chance to develop an audience, I think it can stick around a few seasons.
Consider other titles that appeared shaky at first but went on to strong showings: Firefly, Buffy, heck, even Star Trek, TNG had a pretty shaky start but eventually the actors and writers found the characters and they developed them richly.